[fortran-dev] Merge from trunk

[Tobias Burnus]

Dear all,

I have merged parts from the trunk to the "fortran-dev" branch. 
(Motivated by a question from Paul.)

* Previous version: r211744 (2014-06-17) – that was during the GCC 4.10 
(alias GCC 5) development.

* New commit: r239808.
Merged 6965 commits up to r222315 of 2015-05-22 – that's the trunk GCC 
when GCC 5.1 was released (i.e. a few weeks after GCC 6 stage 1 has 
started).
[Conflicts resolved, but untested/not bootstrapped. (Failed to build 
because my system compiler and ISL were too new.)]

* New commit: 239839
Merged 7698 commits up to r235035 of 2016-04-15 – that's when GCC 6 was 
branched and GCC was set to 7.0.0.
Conflicts resolved and attempted to build; some build errors fixed, some 
remaining. Additionally, there are some dg-* merge conflicts, whose 
resolution I deferred (see below).

* New commit: 239846
Merge up to today's trunk (r239841), resolved merge new conflicts

STATUS:
* Branch is up to date (it just misses the last two commits)
* No merge conflicts, except for the listed test-suite files listed below
* Does not yet compile as some functions changed (partially fixed but 
still more needs to be done)

Cheers,

Tobias

PS: Somehow, "svn merge" takes ages to merge.

PPS: The unresolved (!) merge conflicts in the test suite are: 
gcc/testsuite/gfortran.dg/array_section_2.f90 
gcc/testsuite/gfortran.dg/assumed_type_2.f90 
gcc/testsuite/gfortran.dg/class_allocate_14.f90 
gcc/testsuite/gfortran.dg/coarray_lib_this_image_2.f90 
gcc/testsuite/gfortran.dg/no_arg_check_2.f90 
gcc/testsuite/gfortran.dg/pr32921.f